我正在尝试创建一个简单的计算器应用。
该应用程序在第一个输入中正常工作，但是当我想要第二个输入时它会崩溃，并且它不断显示此错误，任何帮助都将不胜感激：
java.lang.illegalstateException：无法执行方法 Android：OnClick
-
完整的崩溃日志：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.shivamgupta.calculator, PID: 29956
java.lang.IllegalStateException: Could not execute method for android:onClick
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
at android.view.View.performClick(View.java:6261)
at android.widget.TextView.performClick(TextView.java:11180)
at android.view.View$PerformClick.run(View.java:23748)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:6261)
at android.widget.TextView.performClick(TextView.java:11180)
at android.view.View$PerformClick.run(View.java:23748)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6776)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1520)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1410)
Caused by: java.lang.NumberFormatException: For input string: "44335335335"
at java.lang.Integer.parseInt(Integer.java:524)
at java.lang.Integer.valueOf(Integer.java:611)
at com.example.shivamgupta.calculator.MainActivity.equalto(MainActivity.java:148)
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
以下是Java代码（MainActivity.java）：
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
public String x ="";
public String inp1 ="";
public String inp2 ="";
public String opr = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void Addition(View view) {
Button addbtn = (Button) view;
x = x + "+";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void Multiplication(View view) {
Button mulbtn = (Button) view;
x = x + "*";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void Division(View view) {
Button divbtn = (Button) view;
x = x + "/";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void Subtract(View view) {
Button subbtn = (Button) view;
x = x + "-";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void seven(View view) {
Button b = (Button) view;
x = x + "7";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void eight(View view) {
Button b = (Button) view;
x = x + "8";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void nine(View view) {
Button b = (Button) view;
x = x + "9";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void four(View view) {
Button b = (Button) view;
x = x + "4";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void five(View view) {
Button b = (Button) view;
x = x + "5";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void six(View view) {
Button b = (Button) view;
x = x + "6";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void one(View view) {
Button b = (Button) view;
x = x + "1";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void two(View view) {
Button b = (Button) view;
x = x + "2";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void three(View view) {
Button b = (Button) view;
x = x + "3";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void zero(View view) {
Button b = (Button) view;
x = x + "0";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText(x);
}
public void equalto(View view) {
Button btn = (Button) view;
int i=0;
while(x.charAt(i) != '+' && x.charAt(i) != '*' && x.charAt(i) != '/' && x.charAt(i) != '-')
{
inp1 =inp1 + x.charAt(i);
i++;
}
opr = opr + x.charAt(i);
i++;
int len = x.length();
while(x.charAt(i) != x.charAt(len -1))
{
inp2 =inp2 + x.charAt(i);
i++;
}
inp2 =inp2 + x.charAt(i);
Integer firstInput = Integer.valueOf(inp1);
Integer secondInput = Integer.valueOf(inp2);
TextView rtv = (TextView) findViewById(R.id.RES);
if (opr.equalsIgnoreCase("+"))
{
Integer result = firstInput+secondInput;
rtv.setText(""+result);
}
if (opr.equalsIgnoreCase("*"))
{
Integer result = firstInput*secondInput;
rtv.setText(""+result);
}
if(opr.equalsIgnoreCase("/"))
{
if(secondInput==0)
{
String mystring = "invalid";
Toast.makeText(getApplicationContext(), mystring , 10).show();
}
else {
Integer result = firstInput / secondInput;
rtv.setText("" + result);
}
}
if (opr.equalsIgnoreCase("-"))
{
Integer result = firstInput-secondInput;
rtv.setText(""+result);
}
}
public void clear(View view) {
Button b = (Button) view;
x = "";
TextView tv = (TextView) findViewById(R.id.inp);
tv.setText("");
TextView rtv = (TextView) findViewById(R.id.RES);
rtv.setText("");
}
}
引起的： java.lang.integer.parseint（integer.java:524）
" 44335335335"
它无法将您的大输入44335335335转换为整数，因为它超出了整数最大值（2,147,483,647）
将其更改为Double.parseDouble，这将解决问题。